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Zorluk: KolayNormal Pregnancy and Prenatal Care

Match the following normal expected clinical findings during pregnancy with their primary physiological mechanism.

  • Supine dizziness and hypotension in late pregnancyMechanical obstruction of venous return by the enlarged uterus
  • Drop in hemoglobin and hematocrit at 28 weeks gestationIntravascular fluid expansion exceeding erythrocyte production
  • Frequent heartburn and acid refluxHormone-mediated smooth muscle relaxation of the lower esophageal sphincter
  • Sensation of breathlessness without hypoxiaCentral stimulation of the respiratory center leading to larger breaths

Cevap

Supine dizziness is caused by mechanical obstruction of venous return; the drop in hemoglobin is due to intravascular fluid expansion exceeding erythrocyte production; heartburn is due to hormone-mediated smooth muscle relaxation; and breathlessness is caused by central stimulation of the respiratory center.
Each clinical finding corresponds to a specific, well-documented maternal physiological adaptation required to support a developing fetus, primarily driven by hormonal changes (like progesterone) or mechanical factors (like the growing uterus).

Adım Adım Çözüm

1
Identify the cause of supine hypotensive syndrome.
It is matched with mechanical obstruction of venous return.
The gravid uterus physically compresses the inferior vena cava when the patient is in the supine position.
2
Identify the cause of the normal drop in hemoglobin during the second and third trimesters.
It is matched with intravascular fluid expansion exceeding erythrocyte production.
This disproportionate fluid increase creates a dilutional anemia.
3
Identify the cause of new-onset heartburn in pregnancy.
It is matched with hormone-mediated smooth muscle relaxation.
Progesterone relaxes the lower esophageal sphincter, allowing stomach acid to rise.
4
Identify the cause of physiologic dyspnea.
It is matched with central stimulation of the respiratory center.
Progesterone drives the respiratory center to take larger breaths, altering blood gas baselines slightly and causing a sensation of shortness of breath.

Anahtar Kavram

Normal maternal physiological adaptations to pregnancy
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Konular

Normal Pregnancy and Prenatal Care

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